Pasted

tGFXAccess *pGFXAccess = 0x0f0422d; // sample address
LPVOID ptr1 = pGFXAccess;
 
__asm
{
    // Save registers
    pushad
 
    // Restore these from after the dllobj was created
    mov eax, dwEax_setup
    mov ebx, dwEbx_setup
    mov ecx, dwEcx_setup
    mov edx, dwEdx_setup
 
    // Params to open the archive file for access
    push lpVar1
    push paccess
    push pfilename
 
    // Code to open the archive file for access
    mov ecx, ptr1
    mov edx, [ecx]
    mov eax, [edx + 0x10] // how do we calculate the place of function? LOL
    call eax
 
    // Store the result
    mov dwResult, eax
 
    // Restore registers
    popad
}